Histologic features of type 2 autoimmune pancreatitis (hematoxylin and eosin stain). (A) Granulocytic epithelial lesion with neutrophils infiltrating in the lumina (arrowheads) and epithelium (arrows) in a resected specimen. (B) Acinar‐ductal metaplasia with neutrophilic infiltration (thick arrows) in a lobule seen in a biopsy specimen.
From: Notohara K, Kamisawa T, Fukushima N, et al. Guidance for diagnosing autoimmune pancreatitis with biopsy tissues. Pathol Int 2020; 70(10):699-711.
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